Experimental Determination of Bubble Size Distributions in Laboratory Scale Sieve Tray with Mesh

Wang, Weiwen; Li, Suya; Li, Jianlong

doi:10.1021/ie202179d

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…A mass transfer enhancement can be safely realized by increasing the gas-liquid interfacial area. For example, by adding internals [18][19][20][21] or changing operation conditions, [22][23][24] the bubble diameter can be effectively decreased, and thus the interfacial area increased. Alcohols, 25,26 surfactants 8,[27][28][29] and electrolytes [30][31][32] are typically added in coalescence systems to inhibit bubble coalescence 33 and increase bubble rigidity, 34 by which bubbles become smaller and a larger interfacial area is obtained.…”

Section: Introductionmentioning

confidence: 99%

Effects of bubble size on the gas–liquid mass transfer of bubble swarms with Sauter mean diameters of 0.38–4.88 mm in a co‐current upflow bubble column

Wang

Guo

Liu

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Bubble columns have found a wide range of application in biochemical industry. Mass transfer in the bubble column can be manipulated by adjusting the bubble size. Thus, for the design of bubble columns, it is necessary to investigate the behaviors of different-sized bubbles. This work attempts to study the global hydrodynamic and mass transfer characteristics of bubble swarms with Sauter mean diameters (d 32) of 0.38-4.88 mm, from microbubbles to millimeter-sized bubbles, in a co-current bubble column. RESULTS: The specific interfacial areas of the bubble swarms with d 32 of 0.38-1.47 (generated by ceramic membrane module) and 1.05-4.88 mm (generated by plate gas distributor) are 250-1100 and 7-270 m −1 , respectively. The liquid-side mass transfer coefficient (k L) of those two kinds of bubbles are (0.45-1.16) × 10 −4 and (0.58-7.65) × 10 −4 m s −1 , respectively. CONCLUSION: Decreasing the bubble size can effectively increase the volumetric mass transfer coefficient (k L a), especially when the bubble size decreases to several micrometers. The major contribution to the mass transfer enhancement results from the increase of the specific interfacial area. Conversely, the k L decreases clearly. It is demonstrated that Higbieʼs and Frosslingʼs equations can approximate the k L of the bubble swarms with d 32 > 2 mm and d 32 < 2 mm in the bubble column, respectively.

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Section: Introductionmentioning

confidence: 99%

Effects of bubble size on the gas–liquid mass transfer of bubble swarms with Sauter mean diameters of 0.38–4.88 mm in a co‐current upflow bubble column

Wang

Guo

Liu

et al. 2020

J of Chemical Tech & Biotech

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“…According to the basic idea of two-phase flow model [9], gas-liquid two-phase flow on the tray are considered as continuous phase respectively. Each phase has its own properties of fluid.…”

Section: Mathematical Modelmentioning

confidence: 99%

Simulation and Optimization of Strengthening the Gas-Liquid Mass Transfer Structure in Tray Column

Duan

Hou

Sun

et al. 2015

MATEC Web of Conferences

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“…Bubble cutting is broadly considered as a constructive method to achieve the purpose of process intensification by imposing external forces to cut large bubbles into sub-bubbles, limiting the growth of bubble size and aggrandizing the breakup rate of the bubbles. In our previous work [18,19], a better mass transfer efficiency was achieved by installing wire mesh inside the column to break large bubbles into small ones, and it was found that the smaller bubble size generated by the cutting could lead to a lower rising velocity, larger gas holdup, larger gas-liquid interfacial area, a more efficient gas diffusion rate and a larger phase interface renewal rate. In another work of ours [20], the mass transfer conditions in a CO 2 /N 2 -water system were taken into consideration and the enhancement effect of cutting behavior on the mass transfer process was verified systematically based on the combination of numerical simulation and a custom user-defined function (UDF) instruction.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Configurations on Bubble Cutting and Process Intensification in a Micro-Structured Jet Bubble Column Using Digital Image Analysis

et al. 2021

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An experimental study was conducted in this work to investigate the effect of different configurations on bubble cutting and process intensification in a micro-structured jet bubble column (MSJBC). Hydrodynamic parameters, including bubble size, flow field, liquid velocity, gas holdup as well as the interfacial area, were compared and researched for a MSJBC with and without mesh. The bubble dynamics and cutting images were recorded by a non-invasive optical measurement. An advanced particle image velocimetry technique (digital image analysis) was used to investigate the influence of different configurations on the surrounding flow field and liquid velocity. When there was a single mesh and two stages of mesh compared with no mesh, the experimental results showed that the bubble size decreased by 22.7% and 29.7%, the gas holdup increased by 5.7% and 9.7%, and the interfacial area increased by more than 34.8% and 43.5%, respectively. Significant changes in the flow field distribution caused by the intrusive effect of the mesh were observed, resulting in separate liquid circulation patterns near the wire mesh, which could alleviate the liquid back-mixing. The mass transfer experiment results on the chemical absorption of CO2 into NaOH enhanced by a mass transfer process show that the reaction time to equilibrium is greatly reduced in the presence of the mesh in the column.

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Experimental Determination of Bubble Size Distributions in Laboratory Scale Sieve Tray with Mesh

Cited by 12 publications

References 6 publications

Effects of bubble size on the gas–liquid mass transfer of bubble swarms with Sauter mean diameters of 0.38–4.88 mm in a co‐current upflow bubble column

Effects of bubble size on the gas–liquid mass transfer of bubble swarms with Sauter mean diameters of 0.38–4.88 mm in a co‐current upflow bubble column

Simulation and Optimization of Strengthening the Gas-Liquid Mass Transfer Structure in Tray Column

Effect of Different Configurations on Bubble Cutting and Process Intensification in a Micro-Structured Jet Bubble Column Using Digital Image Analysis

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